Ah yes methods of madness, boat floatin'....and the like. Been hauling the fuel bottles for many years in a roll top urethane bag. The two seconds where going strong until last year when the one failed the "squeeze test" finally, lord the miles on that one, so the second second is in use now. BTW the two 2nds were PU'ed some 20 twenty years ago and many holy packs ago. ;)

Use to use another larger for my guide bag. I have also used one with a shoulder harness, but left that route due too the comfort factor-I found it very hot on the back, and I think the mass of the empty bag is somewhat larger. The lack of hip belt was also a factor.

I come out of the alpine backpack tradition so it is the root of the thing for me I guess. I have my system, my method and it is acceptable to me.